Of affection (Genesis 27:26, 27; 29:13; Luke 7:38, 45); reconciliation (Genesis 33:4; 2 Samuel 14:33); leave-taking (Genesis 31:28, 55; Ruth 1:14; 2 Samuel 19:39); homage (Psalm 2:12; 1 Samuel 10:1); spoken of as between parents and children (Genesis 27:26; 31:28, 55; 48:10; 50:1; Exodus 18:7; Ruth 1:9, 14); between male relatives (Genesis 29:13; 33:4; 45:15). It accompanied social worship as a symbol of brotherly love (Romans 16:16; 1 Corinthians 16:20; 2 Corinthians 13:12; 1 Thessalonians 5:26; 1 Peter 5:14). The worship of idols was by kissing the image or the hand toward the image (1 Kings 19:18; Hosea 13:2).

Noah Webster's New International Dictionary of the English Language

1. (v. t.) To salute with the lips, as a mark of affection, reverence, submission, forgiveness, etc.

2. (v. t.) To touch gently, as if fondly or caressingly.

3. (v. i.) To make or give salutation with the lips in token of love, respect, etc.; as, kiss and make friends.

4. (v. i.) To meet; to come in contact; to touch fondly.

5. (n.) A salutation with the lips, as a token of affection, respect, etc.; as, a parting kiss; a kiss of reconciliation.

6. (n.) A small piece of confectionery.